using System.Collections.Generic;
using System.Collections.Immutable;
using System.Reflection;
using Microsoft.Cci;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.Symbols;

internal sealed class SynthesizedStaticConstructor : MethodSymbol
{
	private readonly NamedTypeSymbol _containingType;

	private ThreeState _lazyShouldEmit;

	public override Symbol ContainingSymbol => _containingType;

	public override NamedTypeSymbol ContainingType => _containingType;

	public override string Name => ".cctor";

	internal override bool HasSpecialName => true;

	internal override MethodImplAttributes ImplementationAttributes => MethodImplAttributes.IL;

	public override bool IsVararg => false;

	public override ImmutableArray<TypeParameterSymbol> TypeParameters => ImmutableArray<TypeParameterSymbol>.Empty;

	internal override int ParameterCount => 0;

	public override ImmutableArray<ParameterSymbol> Parameters => ImmutableArray<ParameterSymbol>.Empty;

	public override Accessibility DeclaredAccessibility => (Accessibility)1;

	public override ImmutableArray<Location> Locations => ContainingType.Locations;

	public override ImmutableArray<SyntaxReference> DeclaringSyntaxReferences => ImmutableArray<SyntaxReference>.Empty;

	public override RefKind RefKind => (RefKind)0;

	public override TypeWithAnnotations ReturnTypeWithAnnotations => TypeWithAnnotations.Create(ContainingAssembly.GetSpecialType((SpecialType)6));

	public override FlowAnalysisAnnotations ReturnTypeFlowAnalysisAnnotations => FlowAnalysisAnnotations.None;

	public override ImmutableHashSet<string> ReturnNotNullIfParameterNotNull => ImmutableHashSet<string>.Empty;

	public override FlowAnalysisAnnotations FlowAnalysisAnnotations => FlowAnalysisAnnotations.None;

	public override ImmutableArray<CustomModifier> RefCustomModifiers => ImmutableArray<CustomModifier>.Empty;

	public override ImmutableArray<TypeWithAnnotations> TypeArgumentsWithAnnotations => ImmutableArray<TypeWithAnnotations>.Empty;

	public override Symbol? AssociatedSymbol => null;

	public override int Arity => 0;

	public override bool ReturnsVoid => true;

	public override MethodKind MethodKind => (MethodKind)14;

	public override bool IsExtern => false;

	public override bool IsSealed => false;

	public override bool IsAbstract => false;

	public override bool IsOverride => false;

	public override bool IsVirtual => false;

	public override bool IsStatic => true;

	public override bool IsAsync => false;

	public override bool HidesBaseMethodsByName => false;

	public override bool IsExtensionMethod => false;

	internal override CallingConvention CallingConvention => (CallingConvention)0;

	internal override bool IsExplicitInterfaceImplementation => false;

	public override ImmutableArray<MethodSymbol> ExplicitInterfaceImplementations => ImmutableArray<MethodSymbol>.Empty;

	internal override bool IsDeclaredReadOnly => false;

	internal override bool IsInitOnly => false;

	public sealed override bool IsImplicitlyDeclared => true;

	internal sealed override bool GenerateDebugInfo => true;

	internal override bool IsMetadataFinal => false;

	internal override bool RequiresSecurityObject => false;

	public sealed override bool AreLocalsZeroed => ContainingType.AreLocalsZeroed;

	internal override MarshalPseudoCustomAttributeData? ReturnValueMarshallingInformation => null;

	internal override bool HasDeclarativeSecurity => false;

	internal sealed override ObsoleteAttributeData? ObsoleteAttributeData => null;

	protected sealed override bool HasSetsRequiredMembersImpl
	{
		get
		{
			throw ExceptionUtilities.Unreachable("/_/src/Compilers/CSharp/Portable/Symbols/Synthesized/SynthesizedStaticConstructor.cs", 432);
		}
	}

	internal sealed override bool HasUnscopedRefAttribute => false;

	internal sealed override bool UseUpdatedEscapeRules => false;

	internal SynthesizedStaticConstructor(NamedTypeSymbol containingType)
	{
		_containingType = containingType;
	}

	internal override bool TryGetThisParameter(out ParameterSymbol? thisParameter)
	{
		thisParameter = null;
		return true;
	}

	internal override LexicalSortKey GetLexicalSortKey()
	{
		return LexicalSortKey.SynthesizedCCtor;
	}

	internal sealed override bool IsMetadataNewSlot(bool ignoreInterfaceImplementationChanges = false)
	{
		return false;
	}

	internal sealed override bool IsMetadataVirtual(bool ignoreInterfaceImplementationChanges = false)
	{
		return false;
	}

	public override DllImportData? GetDllImportData()
	{
		return null;
	}

	internal override IEnumerable<SecurityAttribute> GetSecurityInformation()
	{
		throw ExceptionUtilities.Unreachable("/_/src/Compilers/CSharp/Portable/Symbols/Synthesized/SynthesizedStaticConstructor.cs", 360);
	}

	internal sealed override UnmanagedCallersOnlyAttributeData? GetUnmanagedCallersOnlyAttributeData(bool forceComplete)
	{
		return null;
	}

	internal override ImmutableArray<string> GetAppliedConditionalSymbols()
	{
		return ImmutableArray<string>.Empty;
	}

	internal override int CalculateLocalSyntaxOffset(int localPosition, SyntaxTree localTree)
	{
		return ((SourceMemberContainerTypeSymbol)ContainingType).CalculateSyntaxOffsetInSynthesizedConstructor(localPosition, localTree, isStatic: true);
	}

	internal sealed override bool IsNullableAnalysisEnabled()
	{
		return (ContainingType as SourceMemberContainerTypeSymbol)?.IsNullableEnabledForConstructorsAndInitializers(useStatic: true) ?? false;
	}

	internal bool ShouldEmit(ImmutableArray<BoundInitializer> boundInitializersOpt = default(ImmutableArray<BoundInitializer>))
	{
		//IL_0001: Unknown result type (might be due to invalid IL or missing references)
		//IL_0023: Unknown result type (might be due to invalid IL or missing references)
		//IL_0028: Unknown result type (might be due to invalid IL or missing references)
		//IL_000e: Unknown result type (might be due to invalid IL or missing references)
		if (ThreeStateHelpers.HasValue(_lazyShouldEmit))
		{
			return ThreeStateHelpers.Value(_lazyShouldEmit);
		}
		bool flag = CalculateShouldEmit(boundInitializersOpt);
		_lazyShouldEmit = ThreeStateHelpers.ToThreeState(flag);
		return flag;
	}

	private bool CalculateShouldEmit(ImmutableArray<BoundInitializer> boundInitializersOpt = default(ImmutableArray<BoundInitializer>))
	{
		if (boundInitializersOpt.IsDefault)
		{
			if (!(ContainingType is SourceMemberContainerTypeSymbol sourceMemberContainerTypeSymbol))
			{
				return true;
			}
			boundInitializersOpt = Binder.BindFieldInitializers(DeclaringCompilation, sourceMemberContainerTypeSymbol.IsScriptClass ? sourceMemberContainerTypeSymbol.GetScriptInitializer() : null, sourceMemberContainerTypeSymbol.StaticInitializers, BindingDiagnosticBag.Discarded, out ImportChain _);
		}
		ImmutableArray<BoundInitializer>.Enumerator enumerator = boundInitializersOpt.GetEnumerator();
		while (enumerator.MoveNext())
		{
			if (enumerator.Current is BoundFieldEqualsValue boundFieldEqualsValue)
			{
				BoundExpression value = boundFieldEqualsValue.Value;
				if (value != null)
				{
					if (!value.IsDefaultValue())
					{
						return true;
					}
					continue;
				}
			}
			return true;
		}
		return false;
	}
}